How to test a phone line without a phone

For a phone line to function properly an independent circuit is needed that does not touch any other phone lines. One phone line should not come in contact with another phone line. In this case, both phone lines will stop functioning properly.

Steps to test the phone line

There are many steps to test the phone line with multimeter. They are as follows:

Disconnect all the connection that is connected to a telephonic jack in the house. Telephone lines should be opened to test the phone line.

test the phone line with multimeter

The network interface device should be located for phone service. This device is usually installed by Telephone Company on the exterior walls of the house near to the electric meter. Unscrew the screw with a screwdriver and remove the cover.

Once the lines are disconnected, the phone lines will be completely open and ready for testing. Then wait for a minute to check phone lines is active.

Set the multimeter to its continuity setting. These settings help to mark the symbols that resemble a sound wave. But make sure to see the documents that come with your device for specific instructions. A multimeter is used to test a phone line without a phone. If multimeter functions properly then the reading will appear on its digital screen and this will emit a beeping sound.

Continue the test to all the phone lines. Once every pair has been tested you will come to know which phone line work and which phone line does not work. A multi-line phone system has more telephone lines. Multi-line phones are mostly used in a business environment but can also be used in a residential setting also.

There will be a box on the side of the house that is the houses which are connected to their telephonic connections. Usually, the box will be in grey color where the phone lines come into the house. There will be two boxes this is known as the phone line voltage test.

The voltmeter should be set by their specified range. Then attach the leads to the terminals for the red and green wires. In case all the wires are working well with the phone company’s lines, the meter will give the reading of volts. There will be a problem that often occurs less than one volt. But now it is very easy to check whether the phone lines are active or not by simply plugging a phone into the modular plug receptacle and check for a dial tone.


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